Product Details
The YOKOGAWA AAM21 S2, also cataloged as the AAM21 Analog Input Module, operates as a dedicated hardware component for dual-channel isolated analog voltage and current signal acquisition within YOKOGAWA CENTUM control systems.
Suffix Breakdown & Model Matrix
The catalog designation for the AAM21-S2 defines the base hardware architecture and revision parameters:
- Base Model (AAM21): Analog Input Module architecture for voltage and current signal acquisition
- Suffix ( S2): Hardware revision 2 designating standard nest mounting and interface parameter set
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | AAM21 S2 |
| Brand | YOKOGAWA |
| Origin | Japan |
| Operating Temp | -10 to 55 deg C |
| Power Consumption | 24 VDC (+/-10%) |
| Input Channels | 2 channels (isolated) |
| Input Ranges | 0 to 10 V, +/-10 V, 4 to 20 mA, 0 to 20 mA |
| Measurement Accuracy | +/-0.1% of full scale |
| Resolution | 16-bit |
| Sampling Rate | 10 ms/ch (typical) |
| Isolation Voltage | 1500 VAC channel-to-channel |
Channel-to-Channel Isolation and 4-20 mA HART Loop Signal Acquisition
The AAM21-S2 provides 1500 VAC galvanic isolation between individual channels and internal backplane logic to prevent ground loop currents and suppress common-mode electrical noise. Operating at a 16-bit analog-to-digital conversion resolution with a 10 ms per channel sampling cycle, the module converts standard process signals—including 4-20 mA HART loop protocol field devices and +/-10 V transducers—into digital data frames for DCS backplane transmission.
Frequently Asked Questions
Q: What input signal ranges can be configured on the AAM21-S2 module?
A: The module accepts 0 to 10 V DC and +/-10 V DC voltage inputs, as well as 0 to 20 mA DC and 4 to 20 mA DC current inputs across its 2 isolated channels.
Q: What is the dielectric isolation rating between the individual input channels?
A: The module features channel-to-channel galvanic isolation rated at 1500 VAC to prevent cross-talk and signal distortion in noise-prone industrial environments.
Field Installation Guidelines
De-energize rack power prior to mounting or removing the AAM21-S2 module in the system I/O node slot. Observe electrostatic discharge (ESD) protection procedures, wearing a grounded wrist strap when handling the card. Align the module with guide rails and seat the rear connector firmly into the backplane socket, securing top and bottom retaining screws to establish frame ground continuity. Wire analog inputs using shielded twisted-pair cables, bonding the shield wire to earth ground at a single cabinet termination point to prevent ground loops. Maintain physical separation between low-voltage signal cables and AC power conductors.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Industrial Networking Essentials: Demystifying Hubs, Switches, and Routers in Control Systems
Industrial automation relies heavily on robust networking infrastructure to connect programmable logic controllers (PLCs), distributed control systems (DCS), and human-machine interfaces (HMIs). Modern factory automation environments generate vast amounts of real-time operational data across deterministic networks. Understanding the structural differences between hubs, switches, and routers ensures optimal traffic segmentation, minimizes latency, and maintains high network availability.
Safety Relays in Industrial Automation: Fundamentals, Design Standards, and Fail-Safe Architecture
Safety relays form the bedrock of functional safety in modern factory automation, preventing catastrophic equipment failure and protecting plant personnel. While standard electromechanical relays handle basic load switching, they lack the redundant diagnostics required for high-risk industrial environments. Modern industrial automation platforms—including programmable logic controllers (PLCs) and distributed control systems (DCS)—rely on specialized safety relays to monitor field devices and isolate hazards instantly.
Voice-Activated Industrial Automation: Integrating Speech Control into PLC and DCS Architectures
Industrial automation integrates speech recognition, IIoT protocols, and NLP with PLCs and DCS to streamline operations. By leveraging advanced edge computing, engineers enable real-time, hands-free control—allowing personnel to manage smart factory processes safely away from hazardous equipment.